In IE11, How to use console.log?

Question

Try to use console.log() But it\'s always printting undefined.

Try to use the solutions like Console.log IE9 issue it does not work as well

Answer 1

I recently ran into issues with console.log while running the most recent preview build of Windows 10. Below is the code I was trying to log. The log would say my objects functions, proto, and users were undefined. I could "work around" this by changing my version of IE to 9 or putting a breakpoint on console.log(). As far as I can tell, they have just made the console methods more strict to conform with this documentation.

The rules I follow now is to always use console.dir() when outputting objects/variables.

  var PM = PM || {
    users:[]
  };

  var User = (function($){
    //Private Static Variables

    //Constructor
    function User(obj){
      this.id = obj.id;
      this.first = obj.first;
      this.last = obj.last;
    };

    return User;
  })(jQuery); 

  var John = new User({
    id: 1,
    first: 'John',
    last: 'Hargis'
  });
  var Nicole = new User({
    id: 2,
    first: 'Nicole',
    last: 'Hargis'
  });

  PM.users = {
    1: John,
    2: Nicole
  };
  window.console.log(PM); //Undefined
  window.console.dir(PM); //Works    

Answer 2

Even though it's an old question, yet still giving me headache recently when working with IE11.

Simple reason: console object is not initiated unless devtools (i.e. pressing F12 in IE11) is opened.

So a workaround could be, open devtools before loading console.log().

In my case, console.log is loaded when my page is ready, so I open devtools and refresh the page to view my log.